Island



(No Model.) 2 Sheets-Sheet 1.

H. THURSTON. MAGHINE FOR CUTTING DIES.

No 432,959. Patent ed July 22,1890.

WJTNZ'EEEE. 54/ 1125:1135. WQ.

2 N O T s R U H T H MACHINE FOR CUTTING DIES.

Patented July 22, 1890.

WITNEEEIE UNITED STATES PATENT OFFICE.

HORACE THURSTON, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR OF ONE- llALF TO JOHN C. SCHOTT, OF SAME PLACE.

MACHINE FOR CUTTING DIES.

SPECIFICATION forming part of Letters Patent No. 432,959, dated July 22, 1890.

Application filed December 24, 1889- $erial No. 334,854. (No model.)

To all whom it may concern: groove in the shaft 10, so that while the shaft Be it known that l, HORACE THURsTON, of 10 is turned by the beveled gear 11 the shaft Providence, in the county of Providence and may be vertically adjusted. The shaft 10 is State of Rhode Island, have invented a new provided with the annularprojection 13 near 55 and useful Improvement in Machines for Gutits lower or step end, and the spiral spring 14,

ting Dies; and I hereby declare that the folsurrounding the shaft 10, hearing on the anlowing is a full, clear, and exact description nular projection and on the bevel-gear ll, of the same, reference being had to the aecomholds the bevel-gear ll in contact with the panying drawings, forming part of this speciend of the extension 8 and in the proper po- 60 1o fication. sition to gear with the beveled gear 15. The This invention has reference to an improveshaft is stepped or vertically supported in ment in machines for cutting the dies used the cupped screw.16,provided with the thumbby jewelers for cutting ornamental forms out piece 17, so that the shaft 10, and with the of sheet-metal stock. same the cutter 5,1nay be adjusted vertically. 65 15 The object of the invention is to produce a The bracket 18 extends downward and indie-cutter machine in which the die is cut ward from the bed or table 6 and has the nut and undercut by a milling-head while the 19 formed so that the center of the same is face of the die is held in a horizontal plane, exactly in line with the vertical center of the so that the outlines can be readily followed shaft 10. The bevel-gear 15 is secured to and 70 20 by the operative. turns with the shaft 20, which shaft is jour- The invention consists in the peculiar and naled in the bracket 21, and which, like the novel construction of the machine, consisting bracket 18, extends down below the bed or in a die-blank holder and means for moving table 6. v the die-blank in all directions on a horizontal To the shaft 20, supported in the bracket 21, 75 plane, and a conicalmilling-cuttersecured to pulleys or gears may be secured so as to and turning with a vertical spindle, as will be transmitmotion from any prime motor to the more fully set forth hereinafter. shaft, and by the same through the beveled Figure 1 is a top or plan view of my imgears 15 and 11 to the vertical shaft 10 and proved machine for cutting dies. Fig. 2 is a cutter 5. In the drawings, a lathe-dog is So side view of the same. Fig. 3 is a vertical shown secured to the end of the shaft, and sectional view of the machine, and Fig. 4 is this end is countersunk to receive the center a vertical sectional view at right angles to of the lathe-spindle, while in the bracket 8 Fig. 8. the center bearing 22 is secured, so that this Similar numbers of reference indicate cormachine may be used on a lathe when prop- 85 responding parts throughout. erly secured to the lathe-bed, and the dog 15 In the drawings, the number 6 indicates connected with the face-plate or with any the bed or table, which is provided with a cirother device turning with the lathespindle in cular hole. The circular disk 7 is mounted front of the head-stock of the lathe. The on the upper surface of the plate 6 and is prodisk 7 is provided with the wornrgear 23 on 0 o vided with the downward-extending tubular part of its periphery, as is indicated in broken projection or shaft 8, which passes through lines in Fig. 1. The worm 2t meshes with the hole in the plate 6 and forms the pivotal the worm-gear. The shaft of the worm is supbearing on which the disk 7 turns, The cyported in the two trussbearings 25, the end lindrical projection 9 extends upward in the of the shaft being provided with the hand- 95 center of the disk 7 and forms a bearing near wheel 20. By this construction the disk 7 can the cutter of the vertical shaft 10, in which be turned on the tubular shaft 8 around the the mandrel of the cutter 5 is seen red. The vertical shaft 10. The disk? is provided with beveled gear 11 is provided with a sleeve the raised way 27, having two edges undercut which bears against the end of the projection to receive the bed 28, which bed 28 is also Ice 8, and is secured to the vertical shaft 10 by provided with the way 29, on which the workthe screw 12, which enters a longitudinal holder 30 is supported and slides. The

-the plate 34, secured to the edge of the disk.

The plate 34 has an opening in the form of the inverted letter U, and straddles the shaft of the screw between two projecting shoulders. The end of the screw-shaft is provided with the hand-wheel 35. The down ward projeotion on the bed 28 and the screw 33 move in a slot formed in the disk 7, as. is shown in Figs. 1 and 3.' The work-holder 30 is in. like manner provided with a downward projection in which the screw 36 is threaded, this screw being held against longitudinal motion by a plate secured to the bed 28 in the same manner as is the screw 33 to the disk 7 The end of the screw-shaft 36 is provided with the hand-wheel 37.

From the above description and the drawiugs it will be seen that the disk 7 can be turned on the horizontal surface of the table 6 by the hand-wheel 26, operating through the worm 24 and worm-gear 23; that the bed .28 can be moved laterally on the disk 7 by the hand-wheel 35, operating the screw 33, and that the work-holder 30 can be moved laterally at right angles to the way on the bed 28 by the hand-wheel 37 turning the screw 36, so that the die-blank while being outcan be moved in any desired direction on a horizontal plane, while it is at all times in clear sight of the operator and is firmlyheld inthe clamp-plates.

The chips and cuttings fall by the force of gravity down below the blank. The cutter is therefore always clear of all chips or cuttings, and as none of these can reach the face of the blank the outlines are therefore always clean and in sight. The cutter is conical, and therefore the die when out is sufficiently undercut to clear the male die and form asharp cutting-edge on the die.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- I 1. A machine for cutting dies, consisting of a frame supporting a vertical shaft carrying a rotating cutter, and a horizontal work-holder provided with a device for clamping and holdin g the die-blank, said horizontal work-holder being mounted in ways on abed having capacity of lateral motion at right angles to the Work-holder, and provided with hand operating-screws constructed to move the bed and die in all directions on a horizontal plane, as and for the purpose described.

2. The combination, in a machine for cutting dies, with the table 6 and the disk 7 pivotally mounted on the table and provided with a worm-gear, of the worm 24, mounted on a shaft and supported in bearings, the hand-wheel 26, secured to the end of the wormshaft, the bed 28, mounted on the disk 7, and the work-holder30, the bed and work-holder having capacity of lateral motion at right angles to each other, constructed to hold the die-blank and move the same on a horizontal plane, as and for the purpose described.

3. In a die-cutting machine, the combination, with the vertical shaft 10, the cutter 5, and mechanism for rotating the shaft and cutter, of the work-holder 30, provided with the clampingplates 31, the bed 28, the disk 7, pivotally mounted on a horizontal plate or table, and mechanism for moving the workholder on a horizontal plane around the cutter to cut the die, as described.

4:. The combination,with the table 6 and the disk 7, provided with the tubular extension 8, of the vertical shaft 10, the cutter 5, secured to and rotating with the shaft 10, the beveled gear 11, the annular projection 13, and spring 14, the nut 19, and screw-threaded step-bearing 16, the shaft 20, and beveledgear 15, and a work-carrier constructed to firmly hold the die-blank and permit the same to be moved horizontally in all directions, as described.

5. The combination, with the table 6, the brackets 18 and 21, the vertical shaft 10, the beveled gears 11 and 15, the shaft 20, and mechanism for rotating the same, of the disk 7, the worm-gear 23, worm 24, and hand-wheel 26, secured to the shaft of the worm, the ways 27, the bed 28, screw 33, and hand-wheel 35, the work-holder 30, and screw 36, and the clamp-plates 31, constructed to hold the dieblank and move the same on a horizontal plane to cut the die, as described.

HORACE THURSTON. Witnesses: J. A. MILLER, J r., M. F. BLIGH. 

